package com.sjf.batch.demo;

import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.AsyncResult;
import org.springframework.stereotype.Component;

import java.util.Random;
import java.util.concurrent.Future;

@Component
public class Task {

    public static Random random = new Random ();

    @Async
    public Future<String> doTaskOne () throws Exception {
        System.out.println ("开始做任务一");
        long start = System.currentTimeMillis ();
        Thread.sleep (random.nextInt (10000));
        long end = System.currentTimeMillis ();
        System.out.println ("完成任务一，耗时：" + (end - start) + "毫秒");
        return new AsyncResult<> ("任务一完成");
    }

    @Async
    public Future<String> doTaskTwo () throws Exception {
        System.out.println ("开始做任务二");
        long start = System.currentTimeMillis ();
        Thread.sleep (random.nextInt (10000));
        long end = System.currentTimeMillis ();
        System.out.println ("完成任务二，耗时：" + (end - start) + "毫秒");
        return new AsyncResult<> ("任务二完成");
    }

    @Async
    public Future<String> doTaskThree () throws Exception {
        System.out.println ("开始做任务三");
        long start = System.currentTimeMillis ();
        Thread.sleep (random.nextInt (10000));
        long end = System.currentTimeMillis ();
        System.out.println ("完成任务三，耗时：" + (end - start) + "毫秒");
        return new AsyncResult<> ("任务三完成");
    }

}